2024-09-242024-09-24https://hdl.handle.net/11124/179165booksengNo known copyright: http://rightsstatements.org/vocab/NKC/1.0/Colorado School of MinesColorado School of Mines. Young Men's Christian AssociationHandbooks and manualsMines hand book, vol. X, 1911-1912Mines handbook, 1911-1912Text